海龟示踪剂参数示例麻烦

问题描述

Turtle.tracer 的具体用法是什么?在 python 文档中，它被写成 Turn turtle animation on/off and set delay for update graphics. 我用它来禁用动画但参数不清楚，例如在这段代码中，如果我使用了turtle.trace turtle没有绘制表格的其余部分如何设置正确的参数.

What is the exact usage of Turtle.tracer? In python docs it is written Turn turtle animation on/off and set delay for update drawings. I use it for disabling animation but the arguments are not clear for example in this code if I use turtle.trace turtle doesn't draw rest of table how to set correct arguments.

import turtle
turtle.width(5)
yd=xd=-64
turtle.tracer(8,25)#This is the problem
for i in range(2):
    turtle.up()
    turtle.goto(-197.5,yd)
    turtle.down()
    turtle.seth(0)
    turtle.fd(394)
    yd+=128
    turtle.up()
    turtle.goto(xd,197.5)
    turtle.down()
    turtle.seth(270)
    turtle.fd(394)
    xd+=128

推荐答案

使用 turtle.delay(0):

import turtle
turtle.width(5)
yd=xd=-64
turtle.delay(0) # <----
for i in range(2):
    turtle.up()
    turtle.goto(-197.5,yd)
    turtle.down()
    turtle.seth(0)
    turtle.fd(394)
    yd+=128
    turtle.up()
    turtle.goto(xd,197.5)
    turtle.down()
    turtle.seth(270)
    turtle.fd(394)
    xd+=128
turtle.mainloop()

或者使用 turtle.update 如果你使用 turtle.tracer:

...
turtle.tracer(8,25)
for i in range(2):
    ...
turtle.update()
tracer.mainloop()

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